I took them off my Landrover - too much of a risk to get them off when up to the axles in mud! And as said, if they want the wheels, they will have them. As it happens it wasn't a problem for me - but I had pretty standard wheels, though the tyres weren't (I had a total of 15 wheels and tyres for a good while - 5 normal road wheels/tyres, 4 winter wheels/tyres, 6 off road wheels/tyres - off road the one spare went on the roof!